ML2035

February 1997 ML2035 Serial Input Programmable Sine Wave Generator GENERAL DESCRIPTION The ML2035 is a monolithic sinewave generator whose output is programmable from DC to 25kHz. No external components are required. The frequency of the sinewave output is derived from either an external crystal or clock input, providing a stable and accurate frequency reference. The frequency is programmed by a 16-bit serial data word. The ML2035 has a VOUT amplitude of ±VCC/2. The ML2035 is intended for telecommunications and modem applications that need low cost and accurate generation of precise test tones, call progress tones, and signaling tones. FEATURES s s s Programmable output frequency - DC to 25kHz Low gain error and total harmonic distortion 3-wire SPI compatible serial microprocessor interface with double buffered data latch Fully integrated solution - no external components required Frequency resolution of 1.5Hz (±0.75Hz) with a 12MHz clock input Onboard 3 to 12MHz crystal oscillator Synchronous or asynchronous data loading capability Compatible with ML2031 and ML2032 tone detectors and ML2004 logarithmic gain/attenuator s s s s s BLOCK DIAGRAM 5kΩ 5kΩ CLK IN 8 - VOUT CRYSTAL OSCILLATOR 8-BIT DAC 8 PHASE ACCUMULATOR & 512 POINT SINE LOOK-UP TABLE 16 16-BIT DATA LATCH SMOOTHING FILTER 6 + VCC 5 ÷4 ZERO DETECT GND 7 LATI 4 VSS SCK 2 16 16-BIT SHIFT REGISTER 1 SID 3 1 ML2035 PIN CONFIGURATION ML2035 8-Pin PDIP (P08) VSS 1 SCK 2 SID 3 LATI 4 8 7 6 5 CLK...